Characterization and Mechanical Properties of WAAM 3D Printed-Part Welded to AISI 316L Pipe by TIG Welding

Abstract. Wire and arc additive manufacturing (WAAM) is the 3D metal printing technique developed from the gas metal welding process for cost reduction and production the complex shape that cannot be made by the conventional processing. Sometime, joining of 3D printed parts with other printed parts or conventional produced parts is required and controlling the characteristics of the welded components that may affect the service requirements is very importance. In this work, circular wall 3D printed-part was prepared by welding electrode ER316L stainless steel wire based on arc welding, then welded to conventional wrought stainless steel pipe AISI 316L having same thickness by manual TIG welding. The microstructure and mechanical properties of welded joint were investigated according to ASME IX to verify the compatibility of materials and techniques able to produce welded components with acceptable mechanical properties. Based on welding condition used in the study, fracture occurred at the 3D printed-part with an acceptable tensile strength meeting the standard requirement.